CN1246746C - Control method and controller - Google Patents
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- CN1246746C CN1246746C CNB031378102A CN03137810A CN1246746C CN 1246746 C CN1246746 C CN 1246746C CN B031378102 A CNB031378102 A CN B031378102A CN 03137810 A CN03137810 A CN 03137810A CN 1246746 C CN1246746 C CN 1246746C
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Abstract
In a control method, the first controlled variable is made to coincide with a predetermined controlled variable set point. A relation variable representing the relationship between second controlled variables which are designated in advance from measured second controlled variables different from the first controlled variable so as to maintain a predetermined relationship is calculated. A control actuator is so controlled as to make the calculated relation variable coincide with a predetermined relation variable set point. The difference between the calculated relation variable and a relation variable set point corresponding to the calculated relation variable is calculated. The calculated difference is added to the measured first controlled variable. A manipulated variable is calculated by performing feedback control calculation so as to make the sum coincide with the controlled variable set point. The calculated manipulated variable is output to a corresponding control actuator. A control apparatus is also disclosed.
Description
Technical field
The present invention relates to process control technology, particularly relate to control method and the control device of handling a plurality of controlled variables.
Background technology
Control system with a plurality of controlled variable measurement points and a plurality of control drivers, has first target that keeps a controlled variable to be essentially predetermined value, and (controlled variable is poor to keep the variable that concerns that concerns between a plurality of controlled variables of expression, controlled variable ratio, or like that) second target.
For example, the temperature control system of proposition shown in Fig. 9 A and 9B.
In the temperature control system of Fig. 9 A, container R is mid-a temperature sensor TS0 as a plurality of controlled variables (temperature PV0, PV1 and PV2) measurement point, TS1 and TS2 and as the heater H 1 and the H2 of a plurality of control drivers.First target of this temperature control system is that the temperature PV0 at the center of control container R is the predetermined adjustment point SP that heater H 1 and H2 determine.
Only with regard to the temperature PV0 at the center of control container R was predetermined value, the output of heater H 1 and H2 was not well-determined.In other words, the temperature PV0 at center can remain predetermined value, and is higher than the temperature PV2 of close heater H 2 near the temperature PV1 of heater H 1.Conversely, the temperature PV0 at center can remain predetermined value, and is lower than the temperature PV2 of close heater H 2 near the temperature PV1 of heater H 1.
The temperature PV0 at the center of container R is controlled as predetermined value, and the Temperature Distribution among the container R also is important.In other words, as the temperature PV1 of close heater H 1 with near the temperature difference between the temperature H2 of heater H 2, in the time of must being adjusted into predetermined value d12, the output of heater H 1 and H2 is determined by unique.
But the output of well-determined heater H 1 and H2 changes with the temperature conditions among the container R.Even the temperature difference between temperature PV1 and the PV2 is controlled to be predetermined value, under the imbalance situation in thermal insulation fluctuation or container R, also can temperature difference remain on the predetermined value under high well heater output or the low well heater output condition.Therefore, must constitute any feedback control system.
In classical control system, shown in Fig. 9 B, computing unit PID1 and PID2 are disposed at heater H 1 and H2 respectively, constitute to utilize heater H 1 and H2 as the independent feedback control system near the driver of the temperature PV1 of heater H 1 and H2 and PV2.The control algolithm of computing unit PID1 and PID2 is a pid control law.
In Fig. 9 B, the temperature PV0 at the center of container R is not included in the control system in fact.Temperature PV0, the relation between PV1 and the PV2 is in research in advance.
Based on result of study, the value of assigned temperature PV1 and PV2, so that the temperature PV0 at the center of container R and predetermined adjustment point SP, and make near the temperature PV1 and the temperature difference between the PV2 of well heater consistent with adjustment point d12.
In working control, computing unit PID1 control heater H1, and remain close to the predetermined temperature of the temperature PV1 of heater H 1.Computing unit PID2 control heater H2, and remain close to the predetermined temperature of the temperature PV2 of heater H 2.
Temperature control system among Fig. 9 B is another kind of topology example, wherein, the temperature PV0 at the center of container R is made into consistent with predetermined adjustment point SP, and near the temperature PV1 of well heater and and the ratio (PV1-Tmr)/(PV2-Tmr) that rises from room temperature Tmr of PV2 be made into consistent with the adjustment point d12 that is scheduled to.
As the example beyond the temperature control system, enumerate the example of control pressurer system here, two kinds of gases mix in this system, and under the pressure of being scheduled to the supply gas potpourri, as shown in figure 10.
Control pressurer system comprises: it measures the pressure of the mixture pressure PV0 of two kinds of gases sensor PS0, control damper Va11 and Va12, it is as the control driver of two kinds of gas flow rates of control, with flow sensor FS1 and FS2, it measures gas flow rate PV1 and PV2 by valve Va11 and Va12 control.
Control pressurer system has the velocity ratio PV1/PV2 and predetermined corresponding to second target of adjustment point d12 that makes pressure P V0 and corresponding to first target of adjustment point SP of being scheduled to and make flow velocity PV1 and PV2.
Above-mentioned control system arrange to control redundantly driver with the state of controlling the first controlled variable PV0 under, must determine uniquely that controlling driver is output as appropriate value, to satisfy the particular kind of relationship between the second controlled variable PV1 and the PV2.
In the prior art, as described above, constitute independent control near second controlled variable PV1 of control driver and the control system of PV2.Controlled variable PV0, PV1, and the pass between the PV2 ties up to prior research, to adjust the first controlled variable PV0.
The temperature control system of Fig. 9 B, wherein the temperature PV0 at the center of container R is made into consistent with predetermined adjustment point SP, consistent near the temperature difference between heater H 1 and H2 temperature PV1 and the PV2 with predetermined adjustment point d12, respectively temperature PV1 and PV2 near well heater are controlled to particular value independently.
In this temperature control system, the temperature PV0 as the center of first target does not always remain on predetermined adjustment point SP.For example, when unwanted hot material or the heat absorption material executed when entering container R, the temperature PV0 at center does not just remain on and adjusts a some SP.
In the temperature control system of Fig. 9 B, temperature PV0, PV1 and PV2 must be in advance in advance to detect.Number of steps before working control is bigger, is quite time consuming.
In addition, temperature control system can not satisfy such requirement, promptly according to importance, to the temperature and predetermined corresponding to first target of adjustment point SP at the center that makes container R, and make near the temperature PV1 and the temperature difference between the PV2 of well heater and adjust with the priority of corresponding to second target of adjustment point d12 of being scheduled to.
These problems also appear in the temperature system, wherein the temperature PV0 at the center of container R is made into consistent with predetermined adjustment point SP, the ratio (PV1-Tmr)/(PV2-Tmr) that temperature PV1 and PV2 rise from room temperature Tmr is made into consistent with predetermined adjustment point d12, in the control pressurer system of Figure 10, wherein pressure P V0 is made into consistently with predetermined adjustment point SP, and the velocity ratio PV1/PV2 of flow velocity PV1 and PV2 is made into consistent with the adjustment point d12 that is scheduled to.
Summary of the invention
An object of the present invention is to control a kind of control method and control device, its can make first controlled variable accurately with predetermined adjustment point, make to concern that variable is consistent with predetermined adjustment point between a plurality of second controlled variables, and minimizing is at the number of detecting the step that concerns between the controlled variable before the working control in advance.
Another object of the present invention is a kind of control method of control and control device, it can be according to importance, to making first controlled variable accurately put corresponding to first target, and concern variable and the priority that corresponding to second target is put in predetermined adjustment between second controlled variable are adjusted with predetermined adjustment.
According to the present invention, for achieving the above object, provide a kind of control method, it comprises step: make first controlled variable consistent with predetermined controlled variable adjustment point; From measured a plurality of second controlled variables that differ from one another, the calculated relationship variable, the described variable that concerns has been represented the relation between second preassigned, the measured controlled variable, so that keep predetermined relation; With to control driver control, so that calculate concern variable and predetermined concern that variable adjustment point is consistent that controlled step comprises step: to calculate concern variable and and the variable that concerns that calculates concern that accordingly the difference between the variable adjustment point calculates; The difference that calculates is added to first controlled variable that records; By making and value and controlled variable adjustment are put corresponding to FEEDBACK CONTROL and calculated, calculate manipulated variable; With the manipulated variable that calculates to the output of control corresponding driver.
According to the present invention, a kind of control device also is provided, comprising: a plurality of control drivers, they are provided with accordingly with a plurality of second controlled variables; Concern the variable calculation element, it is used for from measured a plurality of second controlled variables that differ from one another, the calculated relationship variable, and the described variable that concerns has been represented the relation between second preassigned, the measured controlled variable, so that keep predetermined relation; The difference calculation element, it is used for concerning variable and concerning that accordingly the difference between the variable adjustment point calculates what calculate, as deviation; Adder, it is used for deviation is added to first controlled variable that records; The manipulated variable calculation element, it is used to calculate manipulated variable, so that consistent with controlled variable adjustment point with value; With the manipulated variable output unit, it is used for to control corresponding driver output manipulated variable
Description of drawings
Fig. 1 illustrates the layout calcspar according to the control device of the first embodiment of the present invention;
Fig. 2 illustrates the operational flowchart of the control device among Fig. 1;
Fig. 3 illustrates the layout calcspar of control device according to a second embodiment of the present invention;
Fig. 4 illustrates the layout calcspar of the control device of a third embodiment in accordance with the invention;
Fig. 5 illustrates the layout calcspar of the control device of a fourth embodiment in accordance with the invention;
Fig. 6 illustrates the layout calcspar of control device according to a fifth embodiment of the invention;
Fig. 7 illustrates the layout calcspar of control device according to a sixth embodiment of the invention;
Fig. 8 illustrates the layout calcspar of control device according to a seventh embodiment of the invention;
Fig. 9 A and 9B illustrate the layout calcspar of conventional temperature control system;
Figure 10 illustrates the layout calcspar of conventional control pressurer system.
Embodiment
(first embodiment)
Below with reference to the accompanying drawings, describe the first embodiment of the present invention in detail.
In the present invention, with accurate control first controlled variable is the feedback control system of first target, also has second target, and (controlled variable is poor to make the variable that concerns that concerns between a plurality of second controlled variables of expression exactly, the controlled variable ratio, or like that) consistent with predetermined value.When concerning that variable departs from predetermined value, then will depart from the value of feedback that is added to first controlled variable.The operation of control driver is eliminated such deviation, and this is a ultimate principle.
As shown in Figure 1, the control device according to first embodiment comprises: adjust some input block 1, some SP is adjusted in its input; The first controlled variable input block 2, it is connected to sensor 7, and imports the first controlled variable PV0; With a plurality of second controlled variable input blocks 3 (3-1,3-2 ..., 3-n) (n is equal to or greater than 2 integer), its be connected to respectively a plurality of sensors 8 (8-1,8-2 ..., 8-n), and import the second controlled variable PV1, PV2 ..., PVn (n is equal to or greater than 2 integer).
Control device further comprises: at least one deviation calculation unit 5, its be connected to the second controlled variable input block 3 (3-1,3-2 ..., 3-n), and the calculation deviation Δ; At least one concerns variable adjustment point input block 4, and it is connected to deviation calculation unit 5, and input concerns variable adjustment point d; With control computation unit 6 (6-1,6-2 ..., 6-n), it is connected to adjusts some input block 1, the first controlled variable input block 2 and deviation calculation unit 5, and output manipulated variable MV.
Adjust the adjustment point SP of the some input block 1 input first controlled variable PV0.The first controlled variable PV0 that 2 inputs of the first controlled variable input block are measured by sensor 7, sensor 7 is arranged on the first controlled variable measurement point.
The second controlled variable input block 3 (3-1,3-2 ..., 3-n) input is by sensor 8 (8-1,8-2 ..., 8-n) a plurality of second controlled variable PV1 of Ce Lianging, PV2,, PVn (n is equal to or greater than 2 integer), sensor 8 are arranged on a plurality of second controlled variables and survey.Concern between a plurality of second controlled variables of variable adjustment point input block 4 input concern variable (controlled variable is poor, controlled variable ratio, or like that) concern variable adjustment point d.
Each control computation unit 6 (6-1,6-2 ..., 6-n) comprising: addition unit, manipulated variable computing unit and manipulated variable output unit.Addition unit will add to the first controlled variable PV0 by the deviation delta that deviation calculation unit 5 calculates.The manipulated variable computing unit calculates manipulated variable MV by making calculating with adjusting the corresponding to FEEDBACK CONTROL of some SP with value of adder unit.The manipulated variable output unit to control corresponding driver sensor 7 (7-1,7-2 ..., 7-n) output manipulated variable MV.
Control device can be by having arithmetic unit, and the computing machine of memory storage and interface and the program of controlling these hardware resources realize.
The adjustment point SP of the first controlled variable PV0 is adjusted by the control device operator.Adjust some SP and input to each control computation unit 6 (the step S101 of Fig. 2) by adjusting some input block 1.The first controlled variable PV0 is measured by the sensor 7 that is arranged on the first controlled variable measurement point.The first controlled variable PV0 inputs to control computation unit 6 (step S102) by P (2).
A plurality of second controlled variable PV1, PV2 ..., PVn by be configured in sensor 8 on the second controlled variable measurement point (8-1,8-2 ..., 8-n) measure.The second controlled variable PV1, PV2 ..., PVn inputs to deviation calculation unit 5 (step S103) by the corresponding second controlled variable input block 3.
Between the second controlled variable PVi and the PVj (i ≠ j:i and j are that 1 (comprising 1) is to the n integer of (comprising n)) concern variable (controlled variable is poor, controlled variable than or like that) concern variable adjustment point dij, adjust by the control device operator.Concern that variable adjustment point dij inputs to deviation calculation unit 5-ij to 5-ji (step S104) by corresponding relation variable adjustment point input block 4-ij.
Note, concern variable adjustment point dij, when between the second controlled variable PVi and the PVj concern that variable is the controlled variable difference time, mean the adjustment point of controlled variable difference PVi-PVj, when concern variable be controlled variable than the time, mean the adjustment point of controlled variable than PVi/PVj.
Concern accordingly that with concerning variable adjustment point dij variable adjustment point input block will be as concerning that variable adjustment point input block 4-ij represents.Similarly, the deviation calculation unit that concerns deviation between the variable of calculated relationship variable adjustment point dij and the second controlled variable PVi and PVj will be represented as deviation calculation unit 5-ij and 5-ji.
Deviation calculation unit 5-ij calculates the deviation that inputs to control computation unit 6-i, and the latter controls the main driver that influences the second controlled variable PVi.Deviation calculation unit 5-ji calculates the deviation that inputs to control computation unit 6-j, and the latter controls the main driver that influences the second controlled variable PVj.
For example, deviation calculation unit 5-ij calculates the variable that concerns between the second controlled variable PVi and the PVj, calculated relationship variable and the corresponding deviation delta ij that concerns between the variable adjustment point, and export deviation delta ij to control corresponding computing unit (with control driver 7-i control corresponding computing unit, the control driver mainly influences the second controlled variable PVi) 6-i.
When between the second controlled variable PVi and the PVj concern that variable is the controlled variable difference time, deviation calculation unit 5-ij calculates controlled variable difference PVi-PVj and calculation deviation Δ ij:
Δij＝PVi-PVj-dij ……(1)
When between the second controlled variable PVi and the PVj concern variable be controlled variable than the time, deviation calculation unit 5-ij calculates controlled variable than PVi/PVj and calculation deviation Δ ij:
Δij＝PVi/PVj-dij ……(2)
Deviation calculation unit 5-ij calculates the variable that concerns between the second controlled variable PVi and the PVj, calculated relationship variable and the corresponding deviation delta ij that concerns between the variable adjustment point dij, and export deviation delta ij to control corresponding computing unit (with control driver 7i control corresponding computing unit, the second controlled variable PVj that the control driver mainly influences) 6-j.
When the second controlled variable PVi and PVj are the controlled variable difference, deviation calculation unit 5-ji calculation deviation Δ ji:
Δji＝PVj-PVi+dij ……(3)
Deviation delta ji uses the identical equation of deviation delta ij that provides with equation (1) to calculate at first.For making the symbol coupling, deviation delta ji uses equation (3) to calculate.
When between the second controlled variable PVi and the PVj concern variable be controlled variable than the time, the variable-definition that concerns between the second controlled variable PVi and the PVj is PVi/PVj, as mentioned above, therefore, deviation calculation unit 5-ij calculation deviation Δ ji:
Δji＝dij-PVi/PVj ……(4)
Deviation delta ji uses the identical calculating formula of deviation delta ij that provides with equation (2) to calculate at first.For making the symbol coupling, deviation delta ji uses equation (4) to calculate.
Suppose and arrange two second controlled variable measurement points, two control drivers 7 and two control computation unit 6 (n=2).In this case, when control algolithm was PID, with the main corresponding conventional control computation unit of control driver 7-1 that influences the second controlled variable PV1, the FEEDBACK CONTROL of using the transport function of Laplace operator S to represent was calculated:
MV1＝Kg1{1+(1/Ti1s)+Td1s}(SP-PV0) ……(5)
Here, MV1 is the manipulated variable that mainly influences the control driver 7-1 of the second controlled variable PV1, and Kg1, Ti1 and Td1 are the proportional gain factors of control computation unit 6-1, integral time and deviation time.In first embodiment, deviation delta 12 adds to the first controlled variable PV0, and therefore, equation (5) can be rewritten as:
MV1＝Kg1{1+(1/Ti1s)+Td1s}(SP-(PV0+Δ12)) ……(6)
Similarly, when control algolithm was PID, with the main corresponding conventional control computation unit of control driver 7-2 that influences the second controlled variable PV2, the FEEDBACK CONTROL of carrying out being represented by transport function was calculated:
MV2＝Kg2{1+(1/Ti2s)+Td2s}(SP-PV0) ……(7)
Here, MV2 is the manipulated variable that mainly influences the control driver 7-2 of the second controlled variable PV2, and Kg2, Ti2 and Td2 are respectively proportional gain factor, integral time and the deviation time of control computation unit 6-2.In first embodiment, deviation delta 21 adds to the first controlled variable PV0, so equation (7) can be rewritten as:
MV2＝Kg2{1+(1/Ti2s)+Td2s}(SP-(PV0+Δ21)) ……(8)
Like this, control computation unit 6-1 and 6-2 calculate manipulated variable MV1 and MV2 by equation (6) and (8).Each control cycle repeats from the operation of step S101 to S108, stops control (step S109) until response from the next instruction of operator or the like.
Below, with the detail operations of explanation according to the control device of first embodiment.
For example, shown in Fig. 9 A and 9B, in container R, arranging has temperature sensor TS0, TS1 and the TS2 that measures temperature PV0, PV1 and PV2, and heater H 1 and H2.First target is to make the temperature PV0 at center of container R with to adjust some SP consistent.Second target be make near the temperature PV1 of heater H 1 and H2 and the temperature difference between the PV2 with concern that variable adjustment point d12 is consistent.In this case, conventional control device carries out independent control basically, will be controlled to be particular value near the temperature PV1 and the PV2 of well heater respectively.
Because temperature PV0 is by two heater H 1 and H2 control, so in conventional control device, the manipulated variable that exports heater H 1 and H2 to does not determine uniquely.That is to say that the temperature at center can remain on predetermined value, and be higher than the temperature PV2 of close heater H 2 near the temperature PV1 of heater H 1.On the contrary, when the temperature PV1 near heater H 1 was lower than the temperature PV2 of close heater H 2, the temperature PV0 at center also can remain on predetermined value.
Near heater H 1 and the temperature PV1 of H2 and the temperature difference between the PV2, according to circumstances converge on any state, do not settle out in specific value.
Illustrate below when be set to be scheduled to as the temperature difference PV1-PV2 that concerns variable between temperature PV1 and the PV2 concern variable adjustment point d12 the time, in the given time, temperature difference PV1-PV2 is greater than the situation that concerns variable adjustment point d12.In this case, because temperature difference must reduce,, increase output from heater H 2 so need the output of minimizing from heater H 1.
According to first embodiment, with heater H 1 control corresponding computing unit 6-1 will on the occasion of: deviation delta 12=PV1-PV2-d12 adds to the first controlled variable PV0, as represented by equation (1) and (6).Control computation unit 6-1 carries out FEEDBACK CONTROL and calculates, so that keep adjusting the value on the some SP.The operation of control computation unit 6-1 is to be enough to calculate manipulated variable MV1 to calculate resulting manipulated variable less than the conventional FEEDBACK CONTROL in the equation (5).
Similarly, 2 control corresponding computing unit 6-2 add to the first controlled variable PV0 with negative value: deviation delta 21=PV2-PV1+d12 with heater H, and are represented as equation (3) and (8).Control computation unit 6-2 carries out FEEDBACK CONTROL and calculates, so that keep adjusting the value on the some SP.The operation of control computation unit 6-2 is enough to calculate manipulated variable MV2 and calculates resulting manipulated variable greater than the conventional FEEDBACK CONTROL in the equation (7).
Control is calculated and is repeatedly carried out continuously by control computation unit 6-1 and 6-2.At last, the manipulated variable that exports heater H 1 and H2 to is restrained uniquely, like this, sets up deviation delta 12=PV1-PV2-d12=0 and Δ 21=PV2-PV1+d12=0, and keeps PV0=SP.
As mentioned above, first embodiment can make the first controlled variable PV0 accurately consistent with predetermined adjusted value SP, make the variable (controlled variable is poor, controlled variable ratio or similar) that concerns between second controlled variable concern that with predetermined variable adjustment point d is consistent.
(second embodiment)
Second embodiment is the more detailed example of first embodiment, as shown in Figure 3, describes the temperature difference control with two control drivers (heater H 1 and H2).Control device comprises deviation calculation unit 5-12 and 5-21, and control computation unit 6-1 and 6-2.
In temperature control system according to second embodiment, measure temperature PV0, the temperature sensor TS0 of PV1 and PV2, TS1 and TS2, and heater H 1 and H2 are arranged among the container R.First target is that central temperature (first controlled variable) PV0 that makes container R is consistent with predetermined adjustment point SP.Second target is to make temperature (second controlled variable) PV1 and the temperature difference (controlled variable is poor) between the PV2 near heater H 1 and H2 concern that with predetermined variable adjustment point d12 is consistent.
In addition, at second embodiment, the process flow diagram of control device is identical with process flow diagram shown in Figure 2.
Deviation calculation unit 5-12, based on measuring by temperature sensor TS1 and TS2 and from second controlled variable PV1 and the PV2 of the second controlled variable input block, 3 inputs, with concern variable adjustment point d12 from what concern variable adjustment point input block 4 input, the following equation that utilization is represented by transport function, accounting temperature difference PV1-PV2 and concern deviation delta 12 between the variable adjustment point d12, as the deviation delta 12 that in equation (6), adds to the first controlled variable PV0:
Δ12＝(PV1-PV2-d12)K12/(1+T12s) ……(9)
Deviation calculation unit 5-21, based on the second controlled variable PV1 and PV2 and concern variable adjustment point d12, the following equation that utilization is represented by transport function, accounting temperature difference PV1-PV2 and concern deviation delta 21 between the variable adjustment point d12, as the deviation delta 21 that in equation (8), adds to the first controlled variable PV0:
Δ21＝(PV2-PV1-d12)K21/(1+T21s) ……(10)
In equation (9) and (10), K12 and K21 are gain coefficients, are used for basis and concern the corresponding to importance of variable adjustment point d12, to the temperature difference weighting between temperature PV1 and the PV2.Gain coefficient be greater than 0 on the occasion of, be generally 1.
When making temperature PV0 and adjust corresponding to first target of some SP, than making temperature difference between temperature PV1 and the PV2 when concerning that corresponding to second target of variable adjustment point d12 is more important, gain coefficient K12 and K21 just turn down.When second target was more important than first target, gain coefficient K12 and K21 just transferred big.
T12 and T21 are time lag of first order filter time constants, are used for avoiding the deviation delta 12 that caused by the variation that concerns variable adjustment point d12 and the sudden change of Δ 21.Time lag of first order filter time constant T12 and T21 fully adjust to much at one, for example the integral multiple of the Ti1 of control computation unit 6-1 and 6-2 and Ti2.In a second embodiment, T12=Ti1 and T21=Ti2.
Control computation unit 6-1, based on adjustment point SP from 1 input of adjustment point input block, by temperature sensor TS0 measurement and from adjusting the first controlled variable PV0 of some input block 1 input, with deviation delta 12 (referring to equation (9)), utilize equation (6) to calculate and export MV1 to the manipulated variable of heater H 1 from deviation calculation unit 5-12 input.
Similarly, control computation unit 6-2 is based on the adjustment point SP from 1 input of adjustment point input block, the first controlled variable PV0, with deviation delta 21 (referring to equation (10)), utilize equation (8) to calculate and export MV2 to the manipulated variable of heater H 2 from deviation calculation unit 5-21 input.
In this way, the temperature PV0 that second embodiment just can make the center among the container R is accurately with to adjust some SP consistent, and make near the temperature PV1 of heater H 1 and H2 and the temperature between the PV2 with concern that variable adjustment point d12 is consistent.
In addition, second embodiment utilizes gain coefficient K12 and K21, puts corresponding to first target of SP to making temperature PV0 and adjustment, and makes temperature difference and the priority that concerns corresponding to second target of variable adjustment point d12 between temperature PV1 and the PV2, adjusts.
In a second embodiment, by filter time constant T12 and T21 deviation delta is carried out time lag filter.Can avoid the sudden change of deviation delta 12 and Δ 21 realizing stable control owing to the variation that concerns variable adjustment point d12 causes at control period.
(the 3rd embodiment)
Below with reference to Fig. 4, the third embodiment of the present invention is described.In Fig. 4, with the same parts of reference number indication identical among Fig. 3.In a second embodiment, be equipped with and relate to temperature controlled all component parts.Even when the minimized number component parts only is installed,, also can obtain effect same as the 3rd embodiment.
The 3rd embodiment does not adopt the deviation calculation unit 5-12 among second embodiment.Control computation unit 6-1a is different from control computation unit 6-1, and it does not add to deviation delta 12 the first controlled variable PV0.Specifically, control computation unit 6-1a utilizes above-mentioned equation (5), calculates the manipulated variable output MV1 to heater H 1.Therefore, the 3rd embodiment and second embodiment mutually specific energy layout is simplified.
(the 4th embodiment)
Below with reference to Fig. 5, the fourth embodiment of the present invention is described.The 4th embodiment is another more detailed example of first embodiment.According to the control device of the 4th embodiment, relate to the temperature difference control of using 4 control drivers (heater H 1, H2, H3 and H4).
Control device comprises: the deviation calculation unit 5-12b of calculation deviation, 5-13b, 5-14b, 5-21b, 5-23b, 5-24b, 5-31b, 5-32b, 5-34b, 5-41b, 5-42b and 5-43b: control computation unit 6-1b, it is connected to deviation calculation unit 5-12b, 5-13b and 5-14b, and calculate manipulated variable output; Control computation unit 6-2b, it is connected to deviation calculation unit 5-21b, 5-23b and 5-24b; Control computation unit 6-3b, it is connected to deviation calculation unit 5-31b, 5-32b and 5-34b; Control computation unit 6-4b, it is connected to deviation calculation unit 5-41b, 5-42b and 5-43b.
Deviation calculation unit 5-12b, 5-13b and 5-14b are connected to temperature sensor TS1.Deviation calculation unit 5-12b also is connected to temperature sensor TS2; Deviation calculation unit 5-13b is connected to temperature sensor TS3; Deviation calculation unit 5-14b is connected to temperature sensor TS4.Deviation calculation unit 5-21b, 5-23b and 5-24b are connected to temperature sensor TS2.Deviation calculation unit 5-21b also is connected to temperature sensor TS1; Deviation calculation unit 5-23b is connected to temperature sensor TS3; And deviation calculation unit 5-24b is connected to temperature sensor TS4.
Deviation calculation unit 5-31b, 5-32b and 5-34b are connected to temperature sensor TS3.Deviation calculation unit 5-31b also is connected to temperature sensor TS1; Deviation calculation unit 5-32b is connected to temperature sensor TS2; And deviation calculation unit 5-34b is connected to temperature sensor TS4; Deviation calculation unit 5-41b, 5-42b and 5-43b are connected to temperature sensor TS4.Deviation calculation unit 5-41b also is connected to temperature sensor TS1; Deviation calculation unit 5-42b is connected to temperature sensor TS2; And deviation calculation unit 5-43b is connected to temperature sensor TS3.
Control computation unit 6-1b, 6-2b, 6-3b and 6-4b are connected to heater H 1 respectively, H2, H3 and H4.Control computation unit 6-4b is connected to temperature sensor TS0.
Not shown adjustment point input block 1, the first controlled variable input block, 2, the second controlled variable input blocks 3 of Fig. 5 and concern variable adjustment point input block 4.
In temperature control system, be equipped with among the container R and measure temperature PV0, PV1, PV2, the temperature sensor TS0 of PV3 and PV4, TS1, TS2, TS3 and TS4, and heater H 1, H2, H3 and H4 according to the 4th embodiment.
First target of temperature control system is to make the temperature PV0 at the center among the container R consistent with predetermined adjustment point SP.
Second target is to make the temperature difference between temperature PV1 and the PV2 concern that with predetermined variable adjustment point d12 is consistent, make the temperature difference between temperature PV1 and the PV3 concern that with predetermined variable adjustment point d13 is consistent, make the temperature difference between temperature PV1 and the PV4 concern that with predetermined variable adjustment point d14 is consistent, make the temperature difference between temperature PV2 and the PV3 concern that with predetermined variable adjustment point d23 is consistent, make the temperature difference between temperature PV2 and the PV4 concern that with predetermined variable adjustment point d24 is consistent, make the temperature difference between temperature PV3 and the PV4 concern that with predetermined variable adjustment point d34 is consistent.
Temperature difference should not be a contradiction, and some temperature difference must determine, for example d13=d12+d23.
Deviation calculation unit 5-12b, based on measuring by temperature sensor TS1 and TS2 and from second controlled variable PV1 and the PV2 of the second controlled variable input block, 3 inputs, and from concerning the d12 of variable adjustment point input block 4 (not shown)s input, the following equation that utilization is represented by transport function, accounting temperature difference PV1-PV2 and concern deviation delta 12 between the variable adjustment point d12:
Δ12＝(PV1-PV2-d12)K12/(1+T12s) ……(11)
Deviation calculation unit 5-13b is based on second controlled variable PV1 and the PV2, and concerns variable adjustment point d13, accounting temperature difference PV1-PV3 and concern deviation delta 13 between the variable adjustment point d13:
Δ13＝(PV1-PV3-d13)K13/(1+T13s) ……(12)
Deviation calculation unit 5-14b is based on second controlled variable PV1 and the PV4, and concerns variable adjustment point d14, accounting temperature difference PV1-PV4 and concern deviation delta 14 between the variable adjustment point d14:
Δ14＝(PV1-PV4-d14)K14/(1+T14s) ……(13)
Deviation calculation unit 5-21b is based on second controlled variable PV2 and the PV1, and concerns variable adjustment point d12, accounting temperature difference PV1-PV2 and concern deviation delta 21 between the variable adjustment point d12:
Δ21＝(PV2-PV1-d12)K21/(1+T21s) ……(14)
Deviation calculation unit 5-23b is based on second controlled variable PV2 and the PV3, and concerns variable adjustment point d23, accounting temperature difference PV2-PV3 and concern deviation delta 23 between the variable adjustment point d23:
Δ23＝(PV2-PV3-d23)K23/(1+T23s) ……(15)
Deviation calculation unit 5-24b is based on second controlled variable PV2 and the PV4, and concerns variable adjustment point d24, accounting temperature difference PV2-PV4 and concern deviation delta 24 between the variable adjustment point d24:
Δ24＝(PV2-PV4-d24)K24/(1+T24s) ……(16)
Deviation calculation unit 5-31b is based on the second controlled variable PV3 and PV1 and concern variable adjustment point d13, accounting temperature difference PV1-PV3 and concern deviation delta 31 between the variable adjustment point d13:
Δ31＝(PV3-PV1-d13)K21/(1+T31s) ……(17)
Deviation calculation unit 5-32b is based on the second controlled variable PV3 and PV2 and concern variable adjustment point d23, accounting temperature difference PV1-PV3 and concern deviation delta 32 between the variable adjustment point d23:
Δ32＝(PV3-PV2-d23)K32/(1+T32s) ……(18)
Deviation calculation unit 5-34b is based on the second controlled variable PV3 and PV4 and concern variable adjustment point d34, accounting temperature difference PV3-PV4 and concern deviation delta 34 between the variable adjustment point d34:
Δ34＝(PV3-PV4-d34)K34/(1+T34s) ……(19)
Deviation calculation unit 5-41b is based on the second controlled variable PV4 and PV1 and concern variable adjustment point d14, accounting temperature difference PV1-PV4 and concern deviation delta 41 between the variable adjustment point d14:
Δ41＝(PV4-PV1+d14)K41/(1+T41s) ……(20)
Deviation calculation unit 5-42b is based on the second controlled variable PV4 and PV2 and concern variable adjustment point d24, accounting temperature difference PV2-PV4 and concern deviation delta 42 between the variable adjustment point d24:
Δ42＝(PV4-PV2+d24)K42/(1+T42s) ……(21)
Deviation calculation unit 5-43b is based on the second controlled variable PV4 and PV3 and concern variable adjustment point d34, accounting temperature difference PV3-PV4 and concern deviation delta 43 between the variable adjustment point d34:
Δ43＝(PV4-PV3+d34)K43/(1+T43s) ……(22)
In (22), K12, K13, K14, K21, K23, K24, K31, K32, K34, K41, K42 and K43 are the gain coefficients that the significance level according to second target is weighted at equation (11).Gain coefficient is the positive number greater than 0, generally is 1.When making temperature PV0 and corresponding to first target of adjustment point SP more important than second target, gain coefficient K12, K13, K14, K21, K23, K24, K31, K32, K34, K41, K42 and K43 just turn down.When second target is more important, gain coefficient, K12, K13, K14, K21, K23, K24, K31, K32, K34, K41, K42 and K43 just transfer big.
The 4th embodiment has a plurality of second targets, make the temperature difference between temperature PV1 and the PV2 concern that with predetermined variable adjustment point d12 is consistent exactly, make the temperature difference between temperature PV1 and the PV3 concern that with predetermined variable adjustment point d13 is consistent, make the temperature difference between temperature PV1 and the PV4 concern that with predetermined variable adjustment point d14 is consistent, make the temperature difference between temperature PV2 and the PV3 concern that with predetermined variable adjustment point d23 is consistent, make the temperature difference between temperature PV2 and the PV4 concern that with predetermined variable adjustment point d24 is consistent, make the temperature difference between temperature PV3 and the PV4 concern that with predetermined variable adjustment point d34 is consistent.
For example, be important if make the temperature difference between temperature PV1 and the PV2 with concerning that the variable adjustment is put d12 consistent, gain coefficient K12 and K21 just transfer big.If making the temperature difference between temperature PV1 and the PV3 is important with concerning that the variable adjustment is put d13 consistent, gain coefficient K13 and K31 just transfer big.
If make the temperature difference between temperature PV1 and the PV4 and concern that variable adjustment point d14 is important, gain coefficient K14 and K41 just transfer big.If making the temperature difference between temperature PV2 and the PV3 is important with concerning that the variable adjustment is put d23 consistent, gain coefficient K23 and K32 just transfer big.
If making the temperature difference between temperature PV2 and the PV4 is important with concerning that the variable adjustment is put d24 consistent, gain coefficient K24 and K42 just transfer big.If making the temperature difference between temperature PV3 and the PV4 is important with concerning that the variable adjustment is put d34 consistent, gain coefficient K34 and K43 just transfer big.
T12, T13, T14, T21, T23, T24, T31, T32, T34, T41, T42 and T43 are time lag of first order filter time constants, in order to the sudden change in deviation delta 12, Δ 13, Δ 14, Δ 21, Δ 23, Δ 24, Δ 32, Δ 34, Δ 41, Δ 42 and the Δ 43 avoiding being caused by the variation that concerns among variable adjustment point d12, d13, d14, d23, d24 and the d34.
Time lag of first order filter time constant T12, T13, T14, T21, T23, T24, T31, T32, T34, T41, T42, and T43 fully are adjusted into no better than for example control computation unit 6-1b, 6-2b, Ti1 integral time of 6-3b and 6-4b, Ti2, Ti3, and Ti4.In the 4th embodiment, T12=T13=T14=Ti1, T21=T23=T24=Ti2, T31=T32=T34=Ti3, and T41=T42=T43=Ti4.
Control computation unit 6-1b, based on an adjustment point SP from the input of adjustment point input block 1 (not shown), measure and from the first controlled variable PV0 of the first controlled variable input block, 2 (not shown)s input by temperature sensor TS0, with from deviation calculation unit 5-12b, deviation delta 12, Δ 13 and the Δ 14 of 5-13b and 5-14b input, by the following equation of representing with transport function, calculate manipulated variable output MV1 to heater H 1:
MV1＝Kg1{1+(1/Ti1s)+Td1s}×{SP-(PV0+Δ12
+Δ13+Δ14)} ……(23)
Control computation unit 6-2b, based on adjusting a some SP, the first controlled variable PV0 and from deviation calculation unit 5-21b, the deviation delta 21 of 5-23b and 5-24b input, Δ 23 and Δ 24, calculate the manipulated variable output MV2 to heater H 2:
MV2＝Kg2{1+(1/Ti2s)+Td2s}×{SP-(PV0+Δ21
+Δ23+Δ24)} ……(24)
Control computation unit 6-3b, based on adjusting a some SP, the first controlled variable PV0 and from deviation delta 31, Δ 32 and the Δ 34 of deviation calculation unit 5-31b, 5-32b and 5-34b input, calculate the manipulated variable output MV3 to heater H 3:
MV3＝Kg3{1+(1/Ti3s)+Td3s}×{SP-(PV0+Δ31
+Δ32+Δ34)} ……(25)
Control computation unit 6-4b, based on adjusting a some SP, the first controlled variable PV0 and from deviation calculation unit 5-41b, the deviation delta 41 of 5-42b and 5-43b input, Δ 42 and Δ 43, calculate the manipulated variable output MV4 to heater H 4:
MV4＝Kg4{1+(1/Ti4s)+Td4s}×{SP-(PV0+Δ41
+Δ42+Δ43)} ……(26)
Therefore, it is accurately consistent with adjustment point SP that the 5th embodiment can make the central temperature PV0 of container R.In addition, the 4th embodiment can make the temperature difference between temperature PV1 and the PV2 concern that with predetermined variable adjustment point d12 is consistent, make the temperature difference between temperature PV1 and the PV3 concern that with predetermined variable adjustment point d13 is consistent, make the temperature difference between temperature PV1 and the PV4 concern that with predetermined variable adjustment point d14 is consistent, make the temperature difference between temperature PV2 and the PV3 concern that with predetermined variable adjustment point d23 is consistent, make the temperature difference between temperature PV2 and the PV4 concern that with predetermined variable adjustment point d24 is consistent, make the temperature difference between temperature PV3 and the PV4 concern that with predetermined variable adjustment point d34 is consistent.
The 4th embodiment can utilize gain coefficient K12, K13, and K14, K21, K23, K24, K31, K32, K34, K41, K42 and K43 adjust the priority of first and second targets.The 4th embodiment also can adjust the priority of second target.
In the 4th embodiment, utilize time constant filter T12, T13, T14, T21, T23, T24, T31, T32, T34, T41, T42 and T43 compile the time lag filter of poor Δ.Can avoid at control period by concerning variable adjustment point d12, d13, d14, d23, the deviation delta 12 that the variation among d24 and the d34 causes, Δ 13, Δ 14, Δ 21, Δ 23, Δ 24, Δ 32, Δ 34, Δ 41, the sudden change in Δ 42 and the Δ 43 realizes stable control.
(the 5th embodiment)
Control device according to the 5th embodiment will be described below.In Fig. 6, with the same parts of reference number indication identical among Fig. 5.In the 4th embodiment, be equipped with and relate to temperature controlled all parts.Even the minimized number component parts only is installed,, also can obtain effect same as the 5th embodiment.
Control computation unit 6-1c is connected to heater H 1 and temperature sensor, and exports MV1 with above-mentioned equation (5) calculating to the manipulated variable of heater H 1.Control computation unit 6-2c is connected to heater H 2, deviation calculation unit 5-21b and temperature sensor, and calculate manipulated variable output MV2 to heater H 2 with above-mentioned equation (8).
Control computation unit 6-3c is connected to heater H 3, deviation calculation unit 5-32b and temperature sensor, and calculate to the manipulated variable of heater H 3 and export MV3:
MV3＝Kg3{1+(1/Ti3s)+Td3s}{SP-(PV0+Δ32)}……(27)
Control computation unit 6-4c is connected to heater H 4, deviation calculation unit 5-43b and temperature sensor, and calculate to the manipulated variable of heater H 4 and export MV4:
MV4＝Kg4{1+(1/Ti4s)+Td4s}{SP-(PV0+Δ43)}……(28)
Therefore, compare with the 4th embodiment, the 5th embodiment can make designs simplification.
(the 6th embodiment)
Below with reference to Fig. 7, the control device according to sixth embodiment of the invention is described.The 6th embodiment is the another more detailed example of first embodiment, describes the velocity ratio control of using two control drivers (control damper Va11 and Va12).
Control device comprises deviation calculation unit 5-12d and 5-21d, and control computation unit 6-1 and 6-2.Not shown adjustment point input block 1, the first controlled variable input block, 2, the second controlled variable input blocks 3 of Fig. 7 and concern variable adjustment point input block 4.
Control pressurer system according to the 6th embodiment comprises: pressure transducer PS0, and it measures pressure (first controlled variable) PV0 of the potpourri of two kinds of gases; Control damper Va11 and Va12, the flow velocity of two kinds of gases of its control; With flow sensor FS1 and FS2, its measurement is subjected to gas flow rate (second controlled variable) PV1 and the PV2 of valve Va11 and Va12 control.First target of control pressurer system is to make pressure P V0 consistent with predetermined adjustment point SP.
Second target is that the velocity ratio (controlled variable ratio) that makes flow velocity PV1 and PV2 concerns that with predetermined variable adjustment point d12 is consistent.
In the 6th embodiment, the treatment scheme of the control device also flow process with shown in Figure 2 is identical.
Deviation calculation unit 5-12d, based on measure by flow sensor FS1 and FS2 and from second controlled variable PV1 and the PV2 of the second controlled variable input block, 3 (not shown) input, with concern variable adjustment point d12 from what concern variable adjustment point input block 4 (not shown) inputs, by the following equation of representing with transport function, calculate velocity ratio PV1/PV2 and concern deviation delta 12 between the variable adjustment point d12:
Δ12＝(PV1/PV2-d12)K12/(1+T12s) ……(29)
Equally, deviation calculation unit 5-21d, based on the second controlled variable PV1 and PV2 with concern variable adjustment point d12, by the following equation of representing with transport function, calculate velocity ratio PV1/PV2 and concern deviation delta 21 between the variable adjustment point d12:
Δ21＝(d12-PV1/PV2)K21/(1+T21s) ……(30)
In equation (29) and (30), K12 and K21 be used for according to concern the corresponding to importance of variable adjustment point d12, to the gain coefficient of the velocity ratio weighting of flow velocity PV1 and PV2.Gain coefficient be greater than 0 on the occasion of, be generally 1.When making pressure P V0 and adjust corresponding to first target of some SP, when concerning that corresponding to second target of variable adjustment point d12 is more important, gain coefficient K12 and K21 just turn down than the velocity ratio that makes flow velocity PV1 and PV2.When second target was more important than first target, gain coefficient K12 and K21 just transferred big.
For avoiding the time lag of first order time constant filter T12 and the T21 of the sudden change usefulness in deviation delta 12 and the Δ 21, fully be adjusted into no better than the Ti1 and Ti2 integral time of for example control computation unit 6-1 and 6-2.In the 6th embodiment, T12=Ti1, T21=Ti2.
Control computation unit 6-1, based on an adjustment point SP from the input of adjustment point input block 1 (not shown), from pressure transducer PS0 and from the first controlled variable PV0 of the first controlled variable input block, 2 (not shown)s inputs, with deviation delta 12 from deviation calculation unit 5-12d input, utilize equation (6), calculate manipulated variable output MV1 to control damper Va11.
Equally, control computation unit 6-2, based on adjusting some SP, the first controlled variable PV0 and the deviation delta of importing from deviation calculation unit 5-21d 21 are utilized equation (8) to calculate to the manipulated variable of control damper Va12 and are exported MV2.
Use this processing, the 6th embodiment can make pressure P V0 accurately with to adjust some SP consistent, and the velocity ratio that makes flow velocity PV1 and PV2 is put 12 consistent with concerning the variable adjustment.The 6th embodiment can utilize gain coefficient K12 and K21, to making pressure P V0 and adjusting first target of some SP and the velocity ratio of flow velocity PV1 and PV2 is adjusted with concerning the priority of corresponding to second target of variable adjustment point d12.
In the 6th embodiment, utilize time constant filter T12 and T21, carry out the time lag filter of deviation delta.Deviation delta 12 that is caused by the variation that concerns among the variable adjustment point d12 at control period and the sudden change in the Δ 21 can be avoided, and realize stable control.
(the 7th embodiment)
Below with reference to Fig. 8, the control device according to seventh embodiment of the invention is described.In Fig. 8, with the same parts of reference number indication identical among Fig. 7.In the 6th embodiment, all parts that relate to pressure control and velocity ratio control are installed.Even the minimized number component parts only is installed,, also can obtain effect same as the 6th embodiment.
The 7th embodiment does not adopt the deviation calculation unit 5-12d among the 6th embodiment.Control computation unit 6-1a does not add to deviation delta 12 the first controlled variable PV0, and these are different with control computation unit 6-1.In more detail, control computation unit 6-1a utilizes above-mentioned equation (5), calculates the manipulated variable output MV1 to heater H 1.So compare with the 6th embodiment, the 7th embodiment can make designs simplification.
In the above-described embodiments, concern that variable represents two second relations between the controlled variable.When obtaining one from three or more second controlled variables when concerning variable, also can use the present invention.
The present invention carries out the deviation calculation program: calculate the variable that concerns between second controlled variable, these second controlled variables are the relations for keeping being scheduled to, appointment from second controlled variable that records in advance; Calculation deviation concerns variable and concern accordingly poor between the variable adjustment point as what calculate, and execution FEEDBACK CONTROL calculation procedure: the deviation that calculates is added to first controlled variable that records; By making and value and controlled variable adjustment are put corresponding to FEEDBACK CONTROL and calculated, calculate manipulated variable; With to control corresponding driver output manipulated variable.
These programs can make first controlled variable accurately consistent with predetermined controlled variable adjustment point, make concern variable and predetermined between second controlled variable concern that variable adjustment point is consistent.
The present invention can save before working control, studied the step of the relation between the controlled variable in advance.Do not need many steps, just can easily make first controlled variable consistent, and can make concerning variable and concerning that variable adjustment point is consistent between second controlled variable with controlled variable adjustment point.
In addition, carry out time lag filter, can avoid the sudden change in the deviation that control period is caused by the variation that concerns variable adjustment point, realize stable control for deviation.
Concern variable and concern that the variable adjustment puts corresponding to importance according to making, multiply each other with gain coefficient, corresponding deviation weighting.This method of adjustment can be put corresponding to first target to making first controlled variable and predetermined controlled variable adjustment, and make the variable that concerns between second controlled variable put the priority of corresponding to second target with concerning the variable adjustment, adjusts.
When having a plurality of second target, the priority in a plurality of second targets also can be adjusted.
Claims (17)
1. control method is characterized in that comprising step:
Make first controlled variable consistent with predetermined controlled variable adjustment point;
From measured a plurality of second controlled variables that differ from one another, the calculated relationship variable, the described variable that concerns has been represented the relation between second preassigned, the measured controlled variable, so that keep predetermined relation; With
The control driver is controlled, so that concern variable and predetermined that calculate concern that variable adjustment point is consistent, controlled step comprises step:
To calculate concern variable and and the variable that concerns that calculates concern the difference between the variable adjustment point accordingly, calculate;
The difference that calculates is added to first controlled variable that records;
By making and value and controlled variable adjustment are put corresponding to FEEDBACK CONTROL and calculated, calculate manipulated variable; With
Manipulated variable to control corresponding driver output calculating.
2. method according to claim 1 is characterized in that:
The step of calculated difference comprises the time lag filter step of carrying out difference.
3. method according to claim 1 is characterized in that:
The step of calculated difference comprises step: concern variable and concern that the variable adjustment puts corresponding to importance according to making, take advantage of corresponding difference with the weighted gain coefficient.
4. control device is characterized in that comprising:
A plurality of control drivers (7), they are provided with accordingly with a plurality of second controlled variables;
Concern variable calculation element (5-ija, 5-jia), it is used for from measured a plurality of second controlled variables that differ from one another, calculated relationship variable, the described variable that concerns has been represented the relation between second preassigned, the measured controlled variable, so that keep predetermined relation;
The difference calculation element (5-ijb, 5-jib), it is used for concerning variable and concerning that accordingly the difference between the variable adjustment point calculates what calculate, as deviation;
Adder (6-1a, 6-2a ..., 6-na), it is used for deviation is added to first controlled variable that records;
The manipulated variable calculation element (6-1b, 6-2b ..., 6-nb), it is used to calculate manipulated variable, so that consistent with controlled variable adjustment point with value; With
The manipulated variable output unit (6-1c, 6-2c ..., 6-nc), it is used for to control corresponding driver (7) output manipulated variable.
5. device according to claim 4 is characterized in that:
Described difference calculation element (5-ijb 5-jib), carries out time lag filter to deviation, and to described adder (6-1a, 6-2a ..., 6-na), output has been subjected to the deviation of time lag filter.
6. device according to claim 4 is characterized in that:
Described difference calculation element (5-ijb 5-jib), concerns variable and concerns that the variable adjustment puts corresponding to importance according to making, with gain coefficient take advantage of corresponding deviation and
Gain coefficient is to the deviation weighting.
7. device according to claim 4 is characterized in that:
Described a plurality of control drivers (7) comprise heating or cooled magnetisation device,
Described concern the variable calculation element (5-ija, 5-jia), with near the temperature of described a plurality of control drivers as second controlled variable, and with the temperature difference between the second different controlled variables as concern variable and
Described adder (6-1a, 6-2a ..., 6-na) with can be by the temperature of described a plurality of control drivers control as first controlled variable.
8. device according to claim 4 is characterized in that:
Described a plurality of control drivers (7) comprise control damper,
Described concern the variable calculation element (5-ija 5-jia), uses a plurality of gas velocities by described a plurality of control drivers (7) control as second controlled variable, and with the airflow velocity ratio between the second different controlled variables as concerning variable, and
Described adder (6-1a, 6-2a ..., 6-na) with making first controlled variable by the gas mixture pressure of described a plurality of control drivers (7) control.
9. device according to claim 4 is characterized in that:
Described manipulated variable calculation element (6-1b, 6-2b ..., 6-nb), calculate by carrying out FEEDBACK CONTROL, calculate manipulated variable.
10. device according to claim 4 is characterized in that
Further comprise: adjust point inputting device (1), it is used to import the adjustment point of first controlled variable.
11. device according to claim 4 is characterized in that
Further comprise: the first controlled variable input media (2), it is used for first controlled variable that input is measured by sensor (7), and sensor (7) is arranged on the first controlled variable measurement point.
12. device according to claim 4 is characterized in that further comprising: the second controlled variable input media (3), it is used for second controlled variable that input is measured by sensor (8), and sensor (8) is arranged on the second controlled variable measurement point.
13. device according to claim 4 is characterized in that further comprising: concern variable adjustment point inputting device (4), its variable that concerns that concerns variable that is used to import between second controlled variable is adjusted point.
14. device according to claim 13 is characterized in that:
Controlled variable difference and controlled variable than both one of, as the variable that concerns between second controlled variable.
15. device according to claim 4 is characterized in that:
If PVj and PVi are second controlled variable, dij is that the variable that concerns that concerns variable between the second controlled variable PVj and the PVi is adjusted point, and Δ ji is a deviation, described difference calculation element (5-ijb, 5-jib) calculation deviation Δ ji:
Δji＝PVj-PVi+dij
I ≠ j:1≤i≤n wherein, 1≤i≤n, and i and j are integer.
16. device according to claim 4 is characterized in that:
If PVj and PVi are second controlled variable, dij is that the variable that concerns that concerns variable between the second controlled variable PVj and the PVi is adjusted point, and Δ ji is a deviation, described difference calculation element (5-ijb, 5-jib) calculation deviation Δ ji:
Δji＝PVj/PVi+dij
I ≠ j:1≤i≤n wherein, 1≤i≤n, and i and j are integer.
17. device according to claim 4 is characterized in that:
If MV is the manipulated variable that mainly influences the control driver of the second controlled variable PV, Kg, Ti and Td be respectively described manipulated variable calculation element (6-1b, 6-2b ... proportional gain factor 6-nb), integral time and deviation time, PV0 is first controlled variable, and Δ is that deviation and s are Laplace operator, described manipulated variable calculation element (6-1b, 6-2b ..., 6-nb) calculate manipulated variable:
MV＝Kg{1+(1/Tis)+Tds}(SP-(PV0+Δ))。
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| JP4291002B2 (en) * | 2003-01-20 | 2009-07-08 | 株式会社山武 | Limit cycle auto-tuning method and heat-cool control device |
| US7891573B2 (en) | 2006-03-03 | 2011-02-22 | Micro Metl Corporation | Methods and apparatuses for controlling air to a building |
| US8265794B2 (en) * | 2007-10-01 | 2012-09-11 | Westlock Controls Corporation | Knowledge based valve control method |
| JP5803361B2 (en) * | 2011-07-12 | 2015-11-04 | いすゞ自動車株式会社 | Actuator control method and actuator control apparatus |
| JP5834628B2 (en) * | 2011-08-29 | 2015-12-24 | いすゞ自動車株式会社 | Actuator control method and actuator control apparatus |
| JP5838681B2 (en) * | 2011-09-16 | 2016-01-06 | いすゞ自動車株式会社 | Actuator control method and actuator control apparatus |
| JP5977682B2 (en) * | 2013-01-25 | 2016-08-24 | アズビル株式会社 | Cooperative operation apparatus and method |
| CN104808611B (en) * | 2015-02-26 | 2017-05-31 | 沈阳东北电力调节技术有限公司 | A kind of programmed method of industrial control system |
| CN111788534A (en) * | 2018-02-26 | 2020-10-16 | 株式会社富士金 | Flow rate control device and flow rate control method |
| JP7139222B2 (en) * | 2018-11-12 | 2022-09-20 | アズビル株式会社 | Control system and control method |
| JP7238461B2 (en) * | 2019-02-25 | 2023-03-14 | 株式会社島津製作所 | Valve controller and vacuum valve |
| CN114020079B (en) * | 2021-11-03 | 2022-09-16 | 北京邮电大学 | Indoor space temperature and humidity regulation and control method and device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4349869A (en) * | 1979-10-01 | 1982-09-14 | Shell Oil Company | Dynamic matrix control method |
| US4852053A (en) * | 1985-10-18 | 1989-07-25 | Exxon Chemical Patents Inc. | Material and energy balance reconciliation |
| JP2877257B2 (en) * | 1991-02-05 | 1999-03-31 | 三菱重工業株式会社 | Work machine control device |
| DE4337794A1 (en) * | 1993-11-05 | 1995-05-11 | Bosch Gmbh Robert | Method and device for regulating and regulating-controlled control of in particular motor vehicle setting sections |
| US5457625A (en) * | 1994-04-13 | 1995-10-10 | The M. W. Kellogg Company | Maximizing process production rates using permanent constraints |
| US5787746A (en) * | 1994-07-25 | 1998-08-04 | Alcan Aluminum Corporation | Multi-stand hot rolling mill tension and strip temperature multivariable controller |
| BE1009406A3 (en) * | 1995-06-09 | 1997-03-04 | Solvay | Method of control methods for synthetic chemicals. |
| DE69637428T2 (en) * | 1995-12-26 | 2009-02-19 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Method for measuring strip profile and method for controlling continuous rolls |
| US6438532B1 (en) * | 1997-01-25 | 2002-08-20 | Kabushiki Kaisha Toshiba | Adjustment rule generating and control method and apparatus |
| DE19732642C2 (en) * | 1997-07-29 | 2001-04-19 | Siemens Ag | Device for controlling an internal combustion engine |
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2002
- 2002-05-21 JP JP2002145799A patent/JP4112900B2/en not_active Expired - Fee Related
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2003
- 2003-05-13 US US10/436,833 patent/US6895287B2/en not_active Expired - Fee Related
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- 2003-05-20 KR KR10-2003-0031881A patent/KR100497293B1/en not_active IP Right Cessation
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| US6895287B2 (en) | 2005-05-17 |
| JP2003337602A (en) | 2003-11-28 |
| KR100497293B1 (en) | 2005-06-23 |
| TW200401177A (en) | 2004-01-16 |
| JP4112900B2 (en) | 2008-07-02 |
| US20040015248A1 (en) | 2004-01-22 |
| TWI225977B (en) | 2005-01-01 |
| CN1462915A (en) | 2003-12-24 |
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